Here is my oil analysis for Shell Rotella 5W40 synthetic (diesel engine oil), About 3,000 hard miles on this oil. Judging from the wear elements, viscosity and TBN, the oil did a great job and the oil is almost like-new condition.

Tony: Is there a comparison available with fresh oil? I wonder whether the copper and iron levels are that high in fresh oil or whether these are deposits from the engine?Can you draw a conclusion as to the condition of the motor from this?